add ergodox Community Layout for LAYOUT_ergodox keyboards (#22963)

initial commit

keyboards/ergodox_stm32/keyboard.json

@@ -17,6 +17,7 @@
     },
     "processor": "STM32F103",
     "bootloader": "custom",
+    "community_layouts": ["ergodox"],
     "layouts": {
         "LAYOUT_ergodox": {
             "layout": [

keyboards/phoenix/keyboard.json

@@ -41,6 +41,7 @@
     "processor": "STM32F401",
     "bootloader": "stm32-dfu",
     "board": "BLACKPILL_STM32_F401",
+    "community_layouts": ["ergodox"],
     "layouts": {
         "LAYOUT_ergodox": {
             "layout": [